John Chrysostom
Catena Aurea · Matthäusevangelium 13
Again, the kingdom of heaven is like unto treasure hid in a field; the which when a man hath found, he hideth, and for joy thereof goeth and selleth all that he hath, and buyeth that field.
The foregoing parables of the leaven, and the grain of mustard-seed, are referred to the power of the Gospel preaching, which has subdued the whole world; in order to shew its value and splendour, He now puts forth parables concerning a pearl and a treasure, saying, The kingdom of heaven is like unto treasure hid in a field. For the Gospel preaching is hidden in this world; and if you do not sell your all you will not purchase it; and this you ought to do with joy; wherefore it follows, which when a man hath found, he hideth it.